Wife is sad about being overweight but doesn't make any effort to change

[T92]

I am 34 (male) and have been married to my wife (32) for 3 years, together for 12. We have one child who is 6 months.

My wife has always been on the larger size. She was a size 16/18 when I met her. I found her incredibly attractive and for the first couple of years her weight wasn't an issue for either of us.

She has fluctuated up and down over the years but has steadily been gaining weight for the past few years. She is currently a size 22.

She constantly moans about her weight now and has done for years. She went to the gym before our wedding but lasted 3 weeks, she regularly does Slimming World or calorie counting but gives up after a couple of weeks. I fully support these endeavours and cook healthy, offer to go for walks with her or take the baby whilst she goes alone etc but she does very little, if any, exercise apart from walking around the supermarket. Our diet isn't outrageous but she snacks a lot and is constantly talking about food. She keeps saying she will 'start on Monday' but never does. She keeps saying that she's just had a baby which I understand but I am the one that takes him for long walks in his pram after I finish work. She has taken him once.

She is constantly asking me if I still love her and fancy her. I do and to be honest, our sex life is as good as it has ever been but there is no getting away from the fact that she is obese and unhealthy.

She came downstairs recently and said that she wanted to run a half marathon next year. I was a little sceptical having run one myself recently and told her that it was a serious undertaking for a non-runner. She got upset and said I didn't believe in her and I should be supportive. I was honest with her and said that she never sees things through. I explained her constant moaning about her weight and lifestyle is hard to listen to when she makes no effort to change.

I came downstairs the next day and apologised and said (truthfully) if she put her mind to it, she could run a half marathon and I will support her but she has to take the training seriously... that was a month ago and she has been for a couple of walks and complained about a sore back and hadn't mentioned it since, kind of proving my point.

I love my wife dearly but her lifestyle and inaction are causing me concern. I genuinely think she wants to change but feels trapped and that she has too much to do. She is a fantastic Mum but I am hands on too, I do all the housework and I will take the little man out for hours at a time on my own and she will generally spend that time sat on the sofa doomscrolling. I get she needs a break but then she complains she is unproductive and the cycle continues.

I'm appealing to the women of Mumsnet, how can I support her?

@Daftypantsi agree re lack of sleep and food. I ballooned after my pregnancies. It was due to using sugar just to power me through the day from absolute exhaustion. Also not having time or energy to prep, and often eating one handed when ravenous so you're stuffing food in quickly and increasing appetite.

Mental exhaustion is just as bad, I go through patches where I'm so drained and the first thing that happens is a very rapid weight gain. Constantly battling with myself 500 times a day to not binge is exhausting and with other life stresses like a new baby I didn't have the mental energy to argue with myself so indulged to the cravings. Unfortunately eating sugary snacks just makes the craving worse so the cycle goes on until I realise I've gained weight and feel embarrassed and ashamed and useless. Exercising is difficult and painful so i avoid it and feel even worse. This is where WLIs are a game changer, it takes away the mental battles. Becoming a new mum can be overwhelming even if she is doing well, she might need to get some time to herself before she is mentally strong enough to face a weight loss battle, even with WLIs.